1 files changed, 2 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index b6cab75..3366cda 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,6 +4,7 @@
 
 use std::io;
 
+#[cfg(feature = "png")]
 pub mod convert;
 mod decode;
 mod encode;
@@ -167,6 +168,7 @@ impl Image {
         decode::decode_image(data)
     }
 
+    #[cfg(feature = "png")]
     pub fn write_png<W: io::Write>(&self, writer: W) -> png::Writer<W> {
         convert::to_png(writer, self)
     }